PyCharm 2016.2 Help

Undoing and Redoing Changes

Basics

The Undo command discards the last changes to the file in the editor.
The Redo command discards the results of the last Undo command.

You can undo or redo your changes as many times as required. However, when you exit PyCharm, the undo
history is lost.

PyCharm smartly defines the logical steps that can be undone and redone. The following events
signal about the end of a logical step:

Pressing Enter.

Repositioning the mouse cursor.

Using navigation keyboard shortcuts.

Cutting or pasting.

Pressing Tab.

PyCharm expands the undo and redo mechanism to complex operations, such as reformatting or refactoring
source code, creating or deleting files. When you undo or redo a complex operation, PyCharm requests for
your confirmation.

How it works?

PyCharm moves the caret before each step of undo/redo, and then performs the Undo/Redo
actions.